/Engine/Source/Runtime/CoreUObject/Public/AssetRegistry/AssetDataTagMap.h
Find a value by key and return an option indicating if it was found, and if so, what the value is.
[FAssetTagValueRef](API\Runtime\CoreUObject\AssetRegistry\FAssetTagValueRef) FindTag ( [FName](API\Runtime\Core\UObject\FName) Tag ) const